Information recording/reproducing method and information recording/reproducing apparatus

Abstract

The amount of focus offset and the amount of spherical aberration correction are adjusted with respect to a disk on which no data is recorded with high precision. The amount of focus offset and the amount of spherical aberration correction are adjusted on the basis of (1) a focus error signal amplitude, (2) a tracking error signal amplitude in a wide track pitch region, and (3) a rectangular waveform wobble signal envelop level.

Description

technical field [0001] The present invention relates to an information recording and reproducing method and an information recording and reproducing device, which enable an information recording and reproducing system for recording and reproducing information by irradiating light. Background technique [0002] This application claims priority from Japanese Patent Application JP2005-117757 filed on Apr. 15, 2005, the contents of which are hereby incorporated by reference into this application. [0003] Optical discs called CDs or DVDs are supported and widely distributed by users as low-capacity and high-capacity random access information recording media. In recent years, personal computers or audio-visual devices have been improved, and the amount of information handled by users has remarkably increased. Under the circumstances described above, optical discs are required to provide a large capacity as a large-capacity information recording medium. [0004] Recording of inf...

AI Technical Summary

Problems solved by technology

In other words, a necessary readout signal cannot be obtained in an optical disc with no recorded data at all, leading to such a problem that adjustment of the spherical aberration correction amount cannot be performed

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